<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Flask Server</title>
    <style>
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            background-color: #f5f5f5;
        }
        .rotating-text {
            font-size: 3em;
            color: #0078D7;
            animation: rotate 5s infinite linear;
            transform-style: preserve-3d;
        }
        @keyframes rotate {
            from {
                transform: rotateY(0deg);
            }
            to {
                transform: rotateY(360deg);
            }
        }
    </style>
</head>
<body>
    <div class="rotating-text">Flask</div>
</body>
</html>